// Workers AI · dad joke modeWhat did ISO 639:o say? "O" so official.

This is a list of ISO 639-3 language codes starting with O.

Index | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | w | x | y | z

Abbreviations are used in the table as follows:

Scope^[1]: I = individual language, M = macrolanguage, S = special code
Type^[2]: C = constructed, E = extinct (in recent times), H = historical (distinct from its modern form), L = living, S = special code

Deprecated codes are enclosed in (parentheses).^[3]

The column Family contains the generic English name of the language's family or macrolanguage.

ISO 639 codes			Scope/Type	Family	Language names
639-3	639-1	639-2/B	Scope/Type	Family	Native	ISO name
`oaa`			I/L			Orok
`oac`			I/L			Oroch
`oak`			I/L	Indo-European	নোয়াখাইল্লা	Noakhali; Noakhailla
`oar`			I/H	Afro-Asiatic		Ancient Aramaic (up to 700 BCE); Old Aramaic (up to 700 BCE)
`oav`			I/H	Northeast Caucasian	اوار ماض	Old Avar
`obi`			I/E			Obispeño
`obk`			I/L			Southern Bontok
`obl`			I/L			Oblo
`obm`			I/H			Moabite
`obo`			I/L			Obo Manobo
`obr`			I/H	Sino-Tibetan		Old Burmese
`obt`			I/H	Indo-European	old brezhoneg	Old Breton
`obu`			I/L			Obulom
`oca`			I/L			Ocaina
(`occ`)			I/C			Occidental
`och`			I/H	Sino-Tibetan		Old Chinese
`oci`	`oc`	`oci`	I/L	Indo-European	occitan	Occitan (post 1500)
`ocm`			I/H	Austronesian		Old Cham
`oco`			I/H	Indo-European	old Kernewek	Old Cornish
`ocu`			I/L			Atzingo Matlatzinca
`oda`			I/L			Odut
`odk`			I/L			Od
`odt`			I/H	Indo-European	*thiudisc	Old Dutch
`odu`			I/L			Odual
`ofo`			I/E			Ofo
`ofs`			I/H	Indo-European	Frīsesk	Old Frisian
`ofu`			I/L			Efutop
`ogb`			I/L			Ogbia
`ogc`			I/L			Ogbah
`oge`			I/H	Kartvelian	ႤႬႠჂ ႵႠႰႧႭჃႪႨ	Old Georgian
`ogg`			I/L			Ogbogolo
(`ogn`)			I/L			Ogan
`ogo`			I/L			Khana
`ogu`			I/L			Ogbronuagum
`oht`			I/H	Indo-European	𒌷𒉌𒅆𒇷	Old Hittite
`ohu`			I/H	Uralic		Old Hungarian
`oia`			I/L			Oirata
`oie`			I/L	Nilo-Saharan		Okolie
`oin`			I/L			Inebu One
`ojb`			I/L		Anishinaabemowin (Ojibwemowin)	Northwestern Ojibwa
`ojc`			I/L		Anishinaabemowin (Ojibwemowin)	Central Ojibwa
`ojg`			I/L		Nishnaabemwin (Jibwemwin)	Eastern Ojibwa
`oji`	`oj`	`oji`	M/L	Cree	ᐊᓂᔑᓇᐯᒧᐎᓐ (Anishinaabemowin)	Ojibwa
`ojp`			I/H	Japonic	上代日本語; 大和言葉	Old Japanese
`ojs`			I/L		ᐊᓂᔑᓂᓂᒧᐎᓐ (Anishininiimowin)	Severn Ojibwa
`ojv`			I/L			Ontong Java
`ojw`			I/L		Anihšināpēmowin (Nakawēmowin)	Western Ojibwa
`oka`			I/L			Okanagan
`okb`			I/L			Okobo
`okc`			I/L	Niger–Congo		Kobo
`okd`			I/L			Okodia
`oke`			I/L			Okpe (Southwestern Edo)
`okg`			I/E			Koko Babangk
`okh`			I/L			Koresh-e Rostam
`oki`			I/L	Nilo-Saharan?	Okiek	Okiek
`okj`			I/E			Oko-Juwoi
`okk`			I/L			Kwamtim One
`okl`			I/E	village sign		Old Kentish Sign Language
`okm`			I/H			Middle Korean (10th-16th cent.)
`okn`			I/L			Oki-No-Erabu
`oko`			I/H	Koreanic	Silla(n); 고대 조선어; 고대 한국어	Old Korean (3rd-9th cent.)
`okr`			I/L			Kirike
`oks`			I/L			Oko-Eni-Osayen
`oku`			I/L			Oku
`okv`			I/L			Orokaiva
`okx`			I/L			Okpe (Northwestern Edo)
`okz`			I/H	Austroasiatic		Old Khmer
`ola`			I/L			Walungge
`olb`			I/L	Niger–Congo?		Oli-Bodiman
`old`			I/L			Mochi
`ole`			I/L	Sino-Tibetan? / isolate?		Olekha
`olk`			I/E			Olkol
`olm`			I/L			Oloma
`olo`			I/L			Livvi
`olr`			I/L			Olrat
`olt`			I/H	Indo-European	old lietuvių	Old Lithuanian
`olu`			I/L	Niger–Congo		Kuvale
`oma`			I/L			Omaha-Ponca
`omb`			I/L			East Ambae
`omc`			I/E			Mochica
(`ome`)			I/E	spurious language		Omejes
`omg`			I/L			Omagua
`omi`			I/L			Omi
`omk`			I/E			Omok
`oml`			I/L			Ombo
`omn`			I/H	unclassified		Minoan
`omo`			I/L			Utarmbung
`omp`			I/H	Sino-Tibetan	ꯃꯩꯇꯩꯂꯣꯟ	Old Manipuri
`omr`			I/H	Indo-European	𑘦𑘨𑘰𑘙𑘲	Old Marathi
`omt`			I/L			Omotik
`omu`			I/E			Omurano
`omw`			I/L			South Tairora
`omx`			I/H	Austroasiatic	ဘာသာမန်	Old Mon
`omy`			I/H	Austronesian		Old Malay
`ona`			I/L			Ona
`onb`			I/L			Lingao
`one`			I/L		Onʌyota’a:ka	Oneida
`ong`			I/L			Olo
`oni`			I/L			Onin
`onj`			I/L			Onjob
`onk`			I/L			Kabore One
`onn`			I/L			Onobasulu
`ono`			I/L		Onǫta’kéka’	Onondaga
`onp`			I/L	Sino-Tibetan	But(pa)	Sartang
`onr`			I/L			Northern One
`ons`			I/L			Ono
`ont`			I/L			Ontenu
`onu`			I/L			Unua
`onw`			I/H	Eastern Sudanic		Old Nubian
`onx`			I/L			Onin Based Pidgin
`ood`			I/L		O'odham	Tohono O'odham
`oog`			I/L	Austroasiatic		Ong
`oon`			I/L			Önge
`oor`			I/L			Oorlams
`oos`			I/H	Indo-European		Old Ossetic
`opa`			I/L			Okpamheri
(`ope`)			I/H			Old Persian
`opk`			I/L			Kopkaka
`opm`			I/L			Oksapmin
`opo`			I/L			Opao
`opt`			I/E			Opata
`opy`			I/L			Ofayé
`ora`			I/L			Oroha
`orc`			I/L			Orma
`ore`			I/L			Orejón
`org`			I/L			Oring
`orh`			I/L			Oroqen
`ori`	`or`	`ori`	M/L	Indo-European	ଓଡ଼ିଆ	Oriya (macrolanguage)
(`ork`)			I/L			Orokaiva
`orm`	`om`	`orm`	M/L	Afro-Asiatic	Oromoo	Oromo
`orn`			I/L			Orang Kanaq
`oro`			I/L			Orokolo
`orr`			I/L			Oruma
`ors`			I/L			Orang Seletar
`ort`			I/L			Adivasi Oriya
`oru`			I/L	Indo-European	اورموړی	Ormuri
`orv`			I/H	Indo-European		Old Russian
`orw`			I/L			Oro Win
`orx`			I/L			Oro
`ory`			I/L			Odia; Oriya (individual language)
`orz`			I/L			Ormu
`osa`		`osa`	I/L		𐓏𐓘𐓻𐓘𐓻𐓟	Osage
`osc`			I/H			Oscan
`osd`			I/L	Indo-European	дигорон ӕвзаг	Digor Ossetic; Digor; Digor Ossetian
`osi`			I/L			Osing
`osn`			I/H	Austronesian	ᮘᮞ ᮞᮥᮔ᮪ᮓ ᮘᮥᮠᮥᮔ᮪	Old Sundanese
`oso`			I/L			Ososo
`osp`			I/H	Indo-European	romançe	Old Spanish
`oss`	`os`	`oss`	I/L	Indo-European	Ирон ӕвзаг	Iron Ossetic; Iron; Iron Ossetian; Ossetian; Ossetic
`ost`			I/L			Osatu
`osu`			I/L			Southern One
`osx`			I/H	Indo-European	Sahsisk	Old Saxon
`ota`		`ota`	I/H		لسان عثمانى	Ottoman Turkish (1500-1928)
`otb`			I/H	Sino-Tibetan		Old Tibetan
`otd`			I/L			Ot Danum
`ote`			I/L			Mezquital Otomi
`oti`			I/E			Oti
`otk`			I/H	Turkic		Old Turkish
`otl`			I/L			Tilapa Otomi
`otm`			I/L			Eastern Highland Otomi
`otn`			I/L			Tenango Otomi
`otq`			I/L			Querétaro Otomi
`otr`			I/L			Otoro
`ots`			I/L			Estado de México Otomi
`ott`			I/L			Temoaya Otomi
`otu`			I/E			Otuke
`otw`			I/L		Nishnaabemwin (Daawaamwin)	Ottawa
`otx`			I/L			Texcatepec Otomi
`oty`			I/H	Dravidian		Old Tamil
`otz`			I/L			Ixtenco Otomi
`oua`			I/L			Tagargrent
`oub`			I/L			Glio-Oubi
`oue`			I/L			Oune
`oui`			I/H	Turkic		Old Uighur
`oum`			I/E			Ouma
(`oun`)			I/L			ǃOǃung
`ovd`			I/L	Indo-European		Elfdalian; Övdalian
`owi`			I/L			Owiniga
`owl`			I/H	Indo-European	Hen Gymraeg	Old Welsh
`oyb`			I/L	Austroasiatic	The	Oy
`oyd`			I/L			Oyda
`oym`			I/L			Wayampi
`oyy`			I/L			Oya'oya
`ozm`			I/L			Koonzime

References

↑ "Scope of denotation for language identifiers". Archived from the original on December 31, 2024. Retrieved June 17, 2025.
↑ "Types of individual languages". Archived from the original on January 4, 2025. Retrieved June 17, 2025.
↑ "Deprecated Language Codes". Retrieved October 19, 2025.

Sources

"ISO 639-2 Registration Authority". Library of Congress.
"ISO 639-3 Registration Authority". SIL International.
Lewis, M. Paul; Simons, Gary F.; Fennig, Charles D., eds. (2016). "Ethnologue: Languages of the World" (19th ed.). Dallas, Texas: SIL International.

External links

"Codes for the Representation of Names of Languages (ISO 639-1 and ISO 639-2 codes)". Library of Congress.
"ISO 639-3 Downloads". SIL International.

[1] "Scope of denotation for language identifiers". Archived from the original on December 31, 2024. Retrieved June 17, 2025.

[2] "Types of individual languages". Archived from the original on January 4, 2025. Retrieved June 17, 2025.

[3] "Deprecated Language Codes". Retrieved October 19, 2025.

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// Workers AI · dad joke modeWhat did ISO 639:o say? "O" so official.

References

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External links